Patent
Directional short circuit detection system and method
TLDR
In this article, the exact position of a short along a conductor, even if the conductor is co-located with other conductors, even conductors connected to low resistance loads, is precisely located.Abstract:
A unique system has been provided to precisely locate the exact position of a short along a conductor, even if the conductor is co-located with other conductors, even conductors connected to low resistance loads. A combination of low frequency test pulse signals, at low duty cycles, and the use of a directional sensor made with shields, account for accuracy and reliability of the system. The shields are arranged to optimally shield and direct signals at the transmitter test signal frequency. The shields also acts to place the shorted wire an optimal distance from the sensor. A method of short circuit location, using the direction sensor of the above-mentioned detection system, is also provided.read more
Citations
More filters
Patent
Device authentication in a PKI
TL;DR: In this article, a method for establishing a link key between correspondents in a public key cryptographic scheme, one of the correspondents being an authenticating device and the other being an authenticated device, is presented.
Patent
Fuse saving tester for fused circuit
TL;DR: In this article, a tester for an electrical system, such as for a vehicle, develops repetitively applied, short duration, control current pulses for reducing load current pulses through the electrical system.
Patent
High voltage cable testing method
TL;DR: In this paper, a method of testing a cabling system is described, which may include discharging an input filter capacitor associated with an accessory component, charging an accessory bus capacitor to a desired voltage level, and connecting the accessory bus capacitance to the input filter capacitance.
Patent
Short circuit diagnostic tool
TL;DR: In this article, a positive temperature coefficient (PTC) member was used to protect the electrical circuit from overcurrent conditions during diagnosis, and a light emitting diode (LED) and resistor was connected in parallel across the PTC member.
Patent
Apparatus and method for detecting a short of a battery connector
TL;DR: In this article, a short circuit detection apparatus and method for detecting a pin-to-pin short of a wireless communications terminal battery connector is described. But this method is not suitable for wireless communications terminals.
References
More filters
Patent
Method and apparatus for determining the direction of a fault on a power transmission line
TL;DR: In this paper, a relay and method for monitoring at least one A.C. power transmission line to determine the position of a fault on the line with respect to a measurement location thereon is presented.
Patent
Loop fault locater
TL;DR: In this paper, the phase angle of the complex input impedance of a telephone cable pair is measured periodically across a predetermined frequency band to produce a periodic time function and the power spectrum of this function is determined and the frequencies of the spectrum maxima are used to estimate the distances to all of the faults from the measurement point.
Patent
Apparatus and method for locating ground faults
TL;DR: In this paper, a low frequency current generator having a variable output, a Hall-effect current probe for detecting the low-frequency current produced by the generator, a filter and amplifier connected to the output of the Hall effect current probe to identify and amplify the low frequency signal and a read-out element connected to output of an amplifier to indicate the relative magnitude of the signal.
Patent
Detector for locating underground cables and faults therein using high-powered electromagnet
TL;DR: In this article, an alternating magnetic field generated by high-powered electromagnet or a rotating magnet induces an indicator signal current in the wires of a cable to be examined at one or both ends of the cable, the indicator signal is monitored by means of a receiver connected to the cable wires.
Patent
Cable test apparatus
TL;DR: In this article, the phase angle resulting from the conductive and resistive portions of current flowing in the wires relative to the applied signal is determined, and the presence of a conductive pair of interest is determined to be at those locations where the measured phase angle is substantially identical.